END IF used(w) = 0 END IF NEXT used(r) = 0 END IF NEXT used(o) = 0 END IF NEXT used(m) = 0 END IF NEXT used(l) = 0 END IF NEXT used(e) = 0 END IF NEXT used(c) = 0 END IF NEXT used(b) = 0 END IF NEXT used(a) = 0 END IFNEXT